> > I don't understand the logic behind using drives, > which are best for random io, for sequent io workloads. Because they are also best for sequential IO. I get 1.3-1.4GB/second from 4 SSDs in RAID or >500MB/s for single disk systems, even with cheap models. Are you getting more than that from high-end spinning rust? Graeme. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance